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Long k**wn as a workplace hazard, Silica dust can cause irreversible lung scarring and cancer. The Department of Labor expects its new limit to save about 600 lives a year. But industry is balking.
أكثر... ??????? ??????: Tighter, Controversial Silica Rules Aimed At Saving Workers' Lungs || ??????: ahlam1399 || ??????: اسم منتداك
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